Effect of phase formation on hydrogen storage properties in Ti-V-Mn alloys by zirconium substitution

X.Y. Chen, R.R. Chen, X. Ding, H.Z. Fang, X.Z. Li, H.S. Ding, Y.Q. Su, J.J. Guo and H.Z. Fu

Energy, 2019, vol. 166, issue C, 587-597

Abstract: In order to improve hydrogen storage properties of Ti23V40Mn37 alloy with the two-phase mixture of BCC and C14 Laves, the alloys with different Zr (x = 0, 2, 4, 6, 8 and 10, at.%) partly substituting for Ti have been produced. The results show that the primary (dendrite) BCC phase decreases and C14 Laves phase increases with increasing Zr. The secondary (blocky) BCC phase appears when Zr content is more than 6 at.%. The hydrogen absorption rate increases after completely activated because the Zr improves the formation of C14 Laves phase. Meanwhile, the reversible hydrogen capacity of Zr-substituted alloys is higher than that of Zr-free alloy. The effective hydrogen storage capacity reaches the maximum when the composition is Ti21Zr2V40Mn37, with a value of 1.85 wt.% at 293 K. Two desorption plateaus appear when Zr content is more than 6 at.%, and the width of the higher plateau increases with increasing of Zr. The higher plateau results from the fast diffusion of H atom in the smaller secondary BCC phase. With increasing the Zr content, the hysteresis and plateau slope factor increase, which can be attributed to the increasing strain energy of interstitial sites and the affinity of interstitial sites with H.

Keywords: Zr substitution; Secondary BCC phase; Hydrogen absorption; High plateau pressure; Reversible hydrogen capacity; Hydride stability (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421832111X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:166:y:2019:i:c:p:587-597

DOI: 10.1016/j.energy.2018.10.121

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().